Fluorinated MOF platform for selective removal and sensing of SO2 from flue gas and air

M. R. Tchalala, P. M. Bhatt, K. N. Chappanda, S. R. Tavares, K. Adil, Y. Belmabkhout, A. Shkurenko, A. Cadiau, N. Heymans, G. Weireld, G. Maurin, K. N. Salama () and M. Eddaoudi ()
Additional contact information
M. R. Tchalala: King Abdullah University of Science and Technology (KAUST)
P. M. Bhatt: King Abdullah University of Science and Technology (KAUST)
K. N. Chappanda: King Abdullah University of Science and Technology (KAUST)
S. R. Tavares: Institut Charles Gerhardt Montpellier (UMR CNRS 5253), Université Montpellier
K. Adil: King Abdullah University of Science and Technology (KAUST)
Y. Belmabkhout: King Abdullah University of Science and Technology (KAUST)
A. Shkurenko: King Abdullah University of Science and Technology (KAUST)
A. Cadiau: King Abdullah University of Science and Technology (KAUST)
N. Heymans: Service de thermodynamique, Faculté Polytechnique de Mons, Université de Mons
G. Weireld: Service de thermodynamique, Faculté Polytechnique de Mons, Université de Mons
G. Maurin: Institut Charles Gerhardt Montpellier (UMR CNRS 5253), Université Montpellier
K. N. Salama: King Abdullah University of Science and Technology (KAUST)
M. Eddaoudi: King Abdullah University of Science and Technology (KAUST)

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract Conventional SO2 scrubbing agents, namely calcium oxide and zeolites, are often used to remove SO2 using a strong or irreversible adsorption-based process. However, adsorbents capable of sensing and selectively capturing this toxic molecule in a reversible manner, with in-depth understanding of structure–property relationships, have been rarely explored. Here we report the selective removal and sensing of SO2 using recently unveiled fluorinated metal–organic frameworks (MOFs). Mixed gas adsorption experiments were performed at low concentrations ranging from 250 p.p.m. to 7% of SO2. Direct mixed gas column breakthrough and/or column desorption experiments revealed an unprecedented SO2 affinity for KAUST-7 (NbOFFIVE-1-Ni) and KAUST-8 (AlFFIVE-1-Ni) MOFs. Furthermore, MOF-coated quartz crystal microbalance transducers were used to develop sensors with the ability to detect SO2 at low concentrations ranging from 25 to 500 p.p.m.

Date: 2019
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DOI: 10.1038/s41467-019-09157-2

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